# JASC 2770: Gust Lock Damper System

- Type: JASC system/component code (FAA)
- ATA chapter: 27 Flight Controls
- Title in the code table: GUST LOCK/DAMPER SYSTEM
- Service difficulty reports: 90
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=26
- Page: https://openairdocs.org/jasc/2770

## What it covers

The system and components protecting flight control surfaces from movement and damage by wind gusts while the aircraft is on the ground. Includes cockpit controlled surface locks common in light aircraft and independent hydraulic gust damper units mounted at each flight control surface on large jet powered aircraft. Does not include the dampening feature of the flight control power boost systems, which are filed with the specific control system (i.e., rudder damper). Typical parts are damper, cylinder, seal, rod end, lock pin cable, etc.

## Service difficulty reports (90, newest 50)

- [SDR VNAA202201071111](https://openairdocs.org/sdr/VNAA202201071111), Jan 5, 2022: Cndair CL6002C10. GUST LOCK. FALSE INDICATION. AS PILOT FYING ON SHORT FNAL INTO RWY 16 AT HPN (<500'AGL), GOT A GLD RELATED MASTER CAUTION MSG. DUE TO THE SHORT RUNWA (N542EA)
- [SDR HNAA2021101200493](https://openairdocs.org/sdr/HNAA2021101200493), Oct 6, 2021: Emb EMB145LR. NONE. NONE. PDIS 603 27-70 2467201 06OCT21 GSO CLOSE ELE GUST LOCK WILL NOT DISENGAGE FACT 06OCT21 21:49 CLT PERFORMED OPS CHECK IAW (N603KC)
- [SDR 2016F00209](https://openairdocs.org/sdr/2016F00209), Oct 13, 2016: Boeing 7373U3. UNKNOWN. VIBRATION. VIBRATION DURING CLIMB &CRUISE (LIKE JAW)
- [SDR SIMA20141127001](https://openairdocs.org/sdr/SIMA20141127001), Nov 27, 2014: Emb EMB145LR. UNKNOWN. MALFUNCTIONED. GUST LOCK AMBER INDICATION IN DESCENT, CB POPPED. DEFERRED IAW MEL 27-11 COMPLIED WITH MX ACTION. TROUBLE SHOT GUST LOCK (N680AE)
- [SDR CHQA20141121331](https://openairdocs.org/sdr/CHQA20141121331), Nov 21, 2014: Emb EMB145LR. SWITCH. FAULTY. THE CREW REPORTED THAT THE GUST LOCK LIGHT CAME ON IN CRUISE FLIGHT. THE CREW DECLARED AN EMER & LANDED WITHOUT INCIDENT (N563RP)
- [SDR SIMA20140110003](https://openairdocs.org/sdr/SIMA20140110003), Jan 10, 2014: Emb EMB145LR. GUST LOCK. JAMMED. ON FLIGHT 3247 CREW REPORTED GUST LOCK JAMMED AFTER BEING RELEASED BEFORE TAKEOFF & DECLARED EMERGENCY. ALL UNLOCKED IND (N933JN)
- [SDR MASA2011062203068](https://openairdocs.org/sdr/MASA2011062203068), Jun 21, 2011: Cndair CL6002B19. TRANSCEIVER. MALFUNCTIONED. UNCOMMANDED GLD DEPLOYMENT ON TAXI. R2 RA TRANSCEIVER. (N75994)
- [SDR SIMA201111503](https://openairdocs.org/sdr/SIMA201111503), Apr 23, 2011: Emb EMB135LR. GUST LOCK. BINDING. ON FLIGHT 2865 ON TAKEOFF THE CREW REPORTED THE ELECTRO GUST LOCK WOULD NOT RELEASE. THE GUST LOCK REMAINED ILLUMINATED  (N722AE)
- [SDR NSVA2011010](https://openairdocs.org/sdr/NSVA2011010), Jan 25, 2011: Saab 340B. CIRCUIT BREAKER. TRIPPED. GUST LOCK WOULD NOT DISENGAGE. RESET GUST LOCK CIRCUIT BREAKER. (N237MJ)
- [SDR SIMA201006708](https://openairdocs.org/sdr/SIMA201006708), Mar 2, 2010: Emb EMB145LR. CARTRIDGE. INOPERATIVE. ON FLIGHT 4319 THE CREW REPORTED THAT THE GUST LOCK DID NOT FULLY RELEASE ON TAKEOFF. THE CREW ELECTED TO ABORT THE TAKE (N698CB)
- [SDR CA100128002](https://openairdocs.org/sdr/CA100128002), Jan 4, 2010: Cndair CL2151A10. BRACKET. CORRODED. (CAN) CORROSION FOUND ON THE FWD FACE OF THE ELEVATOR GUST LOCK BRACKET DURING VISUAL INSP.
- [SDR CHQA200900171](https://openairdocs.org/sdr/CHQA200900171), Aug 4, 2009: Emb EMB135KL. SOLENOID. MALFUNCTIONED. FLIGHT 5357, PHL TO STL. DURING CRUISE AT FL360 THE CREW NOTICED THE GUST LOCK INDICATION ILLUMINATED ON THE GLARE SHIEL (N380SK)
- [SDR C2XA08CL031](https://openairdocs.org/sdr/C2XA08CL031), Mar 16, 2008: Emb EMB145LR. SOLENOID. DEFECTIVE. CLE FLIGHT 3040, THE CREW REPORTED THE GUST LOCK LEVER DID NOT STAY IN LOCKED POSITION. MAINTENANCE INSPECTED AND REPLAC (N16987)
- [SDR DXTA200702636](https://openairdocs.org/sdr/DXTA200702636), Nov 29, 2007: Cessna 560CESSNA. LAMP. INOPERATIVE. YAW DAMPNER WOULD NOT ENGAGE ON DEPARTURE. PERFORMED AND CHECK AND FOUND BOTH LAMP IN THE SWITCH/IND BURNED. RELALMPED A (N837QS)
- [SDR UPS07850875](https://openairdocs.org/sdr/UPS07850875), Sep 13, 2007: Doug DC873F. GUST LOCK. BROKEN. INSPECTION TYPE:C1 FITTING BROKEN AROUND GUST LOCK LEVER BASE. FABRICATED AND INSTALLED REPAIR DOUBLER ON GUST LOCK LEVE (N867UP)
- [SDR FDKA200706299](https://openairdocs.org/sdr/FDKA200706299), Jun 23, 2007: Dhav DHC8101. PLUNGER. LACK OF LUBE. FDM 6285 JFK (1100 PHX LCL) CREW REPORTED A GUST LOCK INOP. MX LUBED GUSTLOCK PLUNGER OPS GOOD. (N802LR)
- [SDR NSVA20070110](https://openairdocs.org/sdr/NSVA20070110), Apr 23, 2007: Saab 340B. SWITCH. MALFUNCTIONED. GUST LOCK LIGHT ON DURING FLIGHT CONTROL CHECK. REINSTALLED RUDDER GUST LOCK ACTUATOR IAW SAAB 340 AMM 27-72-10-04, OPS  (N202SR)
- [SDR NSVA20070088](https://openairdocs.org/sdr/NSVA20070088), Apr 6, 2007: Saab 340B. SWITCH. MALFUNCTIONED. GUST LOCK LIGHT ILLUMINATED WHEN GUST LOCK IS RELEASED. TS TO QUADRANT GUST LOCK SWITCH QUADRANT REMOVED AND REPLACED IA (N202SR)
- [SDR NSVA20070072](https://openairdocs.org/sdr/NSVA20070072), Mar 23, 2007: Saab 340B. SWITCH. MALFUNCTIONED. GUST LOCK ANNUNCIATOR ILLUMINATED BEFORE TAKEOFF. REMOVED AND REPLACED GUST LOCK MICRO SWITCH AND ADJUSTED ACTUATOR SPRI (N311CE)
- [SDR NSVA20070061](https://openairdocs.org/sdr/NSVA20070061), Mar 8, 2007: Saab 340B. SWITCH. MALFUNCTIONED. GUST LOCK LIGHT ILLUMINATED, ENSURE GUST LOCK DISENGAGED, PULLED CB G4 DISCONNECTED C/P SWITCH. REMOVED AND REPLACED THE (N311CE)
- [SDR SIMA200705004](https://openairdocs.org/sdr/SIMA200705004), Feb 18, 2007: Emb EMB135LR. GUST LOCK. FAILED. GUST LOCK LIGHT ILLUMINATED AT ROTATION - NOTICED CIRCUIT BREAKER 24 POPPED - RESET WITH NO EFFECT TO SYSTEM - DIVERTED  (N725AE)
- [SDR NSVA20070022](https://openairdocs.org/sdr/NSVA20070022), Jan 29, 2007: Saab SF340A. ACTUATOR. LEAKING. FOUND RUDDER GUST LOCK WILL NOT ENGAGE. THIS RUDDER GUST LEAK ACTUATOR, VERIFIED 28 VOL AT RUDDER GUST LOCK ACTUATOR IAW (N35SZ)
- [SDR NSVA200600242](https://openairdocs.org/sdr/NSVA200600242), Dec 28, 2006: Saab 340B. SWITCH. UNKNOWN. FOUND GUST LOCK ANNUNCIATOR ILLUMINATED WHEN GUST LOCK RELEASED. REMOVED AND REPLACED GUST LOCK SWITCH IAW 27-72-05, OPS (N277MJ)
- [SDR NSVA200600145](https://openairdocs.org/sdr/NSVA200600145), Sep 17, 2006: Saab 340B. WARNING SWITCH. FAILED. PRIOR TO TAKEOFF (T/O INHIBIT) GUST LOCK LIGHT ILLUMINATED. LIGHT ALSO CAME ON WHEN GUST LOCK IS DIS-ENGAGED. INSPECTED  (N294CJ)
- [SDR 01242006B](https://openairdocs.org/sdr/01242006B), Jan 15, 2006: Saab 340B. ACTUATOR. MALFUNCTIONED. DURING TAKEOFF ROLL A MASTER WARNING LIGHT CAME ON DUE TO A CONFIG LIGHT ON THE CWP. REMOVED AND REPLACED GUST LOCK ACTU (N118SD)
- [SDR RAIA00511017](https://openairdocs.org/sdr/RAIA00511017), Nov 13, 2005: Emb EMB145LR. WARNING LIGHT. ILLUMINATED. FLT - 7970 - ORD - ELEVATOR DISCONNECT LIGHT CAME ON. MAINTENANCE DEFERRED ELEVATOR DISCONNECT LIGHT PER MEL AND OPS AND (N849HK)
- [SDR ARWA20050601](https://openairdocs.org/sdr/ARWA20050601), Jun 2, 2005: Doug DC863F. CABLE. BROKEN. GUST LOCK HARD TO ENGAGE SUSPECT CABLE BROKEN. R & R GUST LOCK CABLE RUNNING NR 79A IN ACCORDANCE WITH DC8 M/M 27-70-0.  (N661AV)
- [SDR CHQA200500076](https://openairdocs.org/sdr/CHQA200500076), Apr 7, 2005: Emb EMB135KL. WARNING SYSTEM. FALSE INDICATION. WHILE CRUISING AT FL350 BOTH AMBER GUST LOCK WARNING LIGHTS ILLUMINATED. THE QRH PROCEDURES WERE RUN, WHICH AT THE END S (N295SK)
- [SDR RAIA00402029](https://openairdocs.org/sdr/RAIA00402029), Feb 25, 2004: Emb EMB145. SOLENOID. DEFECTIVE. GUST LOCK WILL NOT DISENGAGE. MAINTENANCE DEFERRED SYSTEM IAW MEL. SUBSEQUENTLY CLEARED DMI BY REMOVING AND REPLACING TH (N833HK)
- [SDR 146951](https://openairdocs.org/sdr/146951), Jan 16, 2004: Saab SF340A. WARNING LIGHT. ILLUMINATED. ON 01-16-2004, APPROX 1245 (UTC), FLT 4625 SCE-PIT, CREW RETURNED TO GATE WHEN THE GUST LOCK WARNING ILLUMINATED WITH TH (N148SD)
- [SDR AUS20030939](https://openairdocs.org/sdr/AUS20030939), Sep 12, 2003: Swrngn SA227AC. PLUNGER. CRACKED. (AUS) RUDDER GUST LOCK ASSEMBLY PLUNGER CORRODED, BENT AND CRACKED.
- [SDR AUS20030928](https://openairdocs.org/sdr/AUS20030928), Sep 10, 2003: Swrngn SA227*. PLUNGER. FRACTURED. (AUS) RUDDER GUST LOCK PLUNGER BROKEN INTO TWO PARTS.
- [SDR 2003FA0000810](https://openairdocs.org/sdr/2003FA0000810), Jul 31, 2003: Raythn HAWKER800XP. GUST LOCK. MISSING. RUDDER GUST LOCK WAS MISSING FROM AIRCRAFT.
- [SDR 161281](https://openairdocs.org/sdr/161281), Jul 25, 2003: Saab SF340A. SWITCH. LACK OF LUBE. FLT 4466 ON TAKEOFF FROM TTN-PIT ABORTED T/O DUE TO GUST LOCK WARNING LIGHT ILLUM. AC RETURNED TO GATE. MAINTENANCE INSP (N340SZ)
- [SDR 199681](https://openairdocs.org/sdr/199681), Jul 25, 2003: Saab SF340A. SWITCH. LACK OF LUBE. FLT 4466 ON TAKEOFF FROM TTN-PIT ABORTED T/O DUE TO GUST LOCK WARNING LIGHT ILLUM. AC RETURNED TO GATE. MAINTENANCE INSP (N340SZ)
- [SDR MALA030243](https://openairdocs.org/sdr/MALA030243), Apr 23, 2003: Saab SF340A. ACTUATOR. MALFUNCTIONED. PILOT STATED WHILE OUT ON RUNWAY PRECEDING FLIGHT 3183, RUDDER GUST LOCK DID NOT RELEASE UNTIL 20 SECONDS LATER FROM REL (N68XJ)
- [SDR 001031](https://openairdocs.org/sdr/001031), Jan 7, 2003: Saab SF340A. GUST LOCK. INOPERATIVE. ON 01/07/03, APPROX 1140(UTC), AIRCRAFT RETURNED TO GATE WHEN THE RUDDER GUST LOCK WOULD NOT DISENGAGE. THE CREW STATED  (N149SZ)
- [SDR SIMA200227901](https://openairdocs.org/sdr/SIMA200227901), Sep 27, 2002: Emb EMB135KL. SWITCH. OUT OF ADJUST. BHM - FLT 3765 - CREW REPORTED A GUSTLOCK LIGHT INDICATION DURING FLIGHT. CREW DECLARED AN EMERGENCY AND DIVERTED TO BHM (N825AE)
- [SDR C2XA02IA175](https://openairdocs.org/sdr/C2XA02IA175), Aug 15, 2002: Emb EMB145LR. CARTRIDGE. WEAK. Crew reported that the gustlock indication illuminated during flight. The aircraft diverted and landed at CRP without in (N29906)
- [SDR AUS20020504](https://openairdocs.org/sdr/AUS20020504), May 30, 2002: Swrngn SA227*. TUBE. CRACKED. (AUS) RUDDER GUST LOCK PLUNGER GUIDE TUBE FRACTURED APPROXIMATELY HALFWAY ALONG THE LENGTH. THE LOWER HALF OF THE FRACTU
- [SDR SIMA200211604](https://openairdocs.org/sdr/SIMA200211604), Apr 26, 2002: Emb EMB135KL. PLUNGER. DIRTY. CMH - FLT 3882 - DURING FLIGHT CREW REPORTED THE GUST LOCK LIGHT ILLUMINATED. CREW FOLLOWED AOM PROCEDURES AND LANDED AT (N800AE)
- [SDR QXEA0200715](https://openairdocs.org/sdr/QXEA0200715), Apr 20, 2002: Dhav DHC8202. BRACKET. LOOSE. PDX- ELEVATOR GUST LOCK BRACKETS, BOTH ARE LOOSE AND SMOKING. REPAIRED IAW DHC-8 RD 8-55-112, SRM 27-32-11, PG 402, 403  (N351PH)
- [SDR C2XA02CL086](https://openairdocs.org/sdr/C2XA02CL086), Mar 28, 2002: Emb EMB145LR. SWITCH. OUT OF ADJUST. EWR-STL FLIGHT#3543 THE CREW REPORTED A GUST LOCK LIGHT ILLUMINATED IN FLIGHT.THE AIRCRAFT DIVERTED INTO CLEVELAND AND L (N16541)
- [SDR PCAA0203037](https://openairdocs.org/sdr/PCAA0203037), Mar 19, 2002: Dhav DHC8102. SPRING. BROKEN. PHL-FLIGHT#3631. CREW REPORTED THAT THE GUST LOCK STICKS GOING ON OR OFF. MAINTENANCE REPLACED THE GUST LOCK SPRINGS IN  (N836EX)
- [SDR MALA020112](https://openairdocs.org/sdr/MALA020112), Dec 1, 2001: Bac AVRO146RJ85A. DAMPENER. DEFECTIVE. PREVIOUS CREW REPORTED ELEVATORS NOT DAMPENING IN THE WIND. MAINTENANCE REMOVED AND REPLACED LT AND RT ELEVATOR GUST DAM (N511XJ)
- [SDR C2XAA01BT121](https://openairdocs.org/sdr/C2XAA01BT121), May 31, 2001: Aerosp ATR42320. CAM FOLLOWER. SEIZED. YUL---Durring a scheduled 4C inspection. The pitch uncoupling mechanism was found seized.Maintenance removed and replace (N21837)
- [SDR BTV2001F00000](https://openairdocs.org/sdr/BTV2001F00000), May 29, 2001: Gulstm G1159B. BRACKET. FRACTURED. DURING A ROUTINE SCHEDULED INSPECTION, A MECHANIC NOTED THE RUDDER GUST LOCK HOOK SUPPORTING STRUCTURE WAS FRACTURED. FU (N344AA)
- [SDR CA010323009](https://openairdocs.org/sdr/CA010323009), Feb 22, 2001: Saab 340B. SWITCH. BURNED OUT. (CAN) ON PREPARATION FOR TAKEOFF WARNING LIGHT ILUMINATED WHEN GUSTLOCK RELEASED. A/C RETURNED TO RAMP. INVEST. REVEALED
- [SDR AU010039](https://openairdocs.org/sdr/AU010039), Jan 16, 2001: Fokker F28MK4000. LOCK. CRACKED. (AUS) ELEVATOR GUSTLOCK HOUSING MOUNTING LUGS CRACKED. FOUND DURING INSPECTION IAW AD/F28/72 AMDT1. SUSPECT CAUSED BY LO
- [SDR EISA20000147](https://openairdocs.org/sdr/EISA20000147), Sep 12, 2000: Boeing 727223. COUPLER. INOPERATIVE. ON TAKEOFF UPPER YAW DAMPER INOP. AIR TURNBACK TO (IND). REMOVED AND REPLACED YAW DAMPER COUPLER. OPS CHECK NORMAL. (N315NE)

All 90: https://openairdocs.org/jasc/2770/reports.md

## Other codes in chapter 27

- [JASC 2700](https://openairdocs.org/jasc/2700): Flight Control System (1,742 reports)
- [JASC 2701](https://openairdocs.org/jasc/2701): Control Column Section (510 reports)
- [JASC 2710](https://openairdocs.org/jasc/2710): Aileron Control System (2,967 reports)
- [JASC 2711](https://openairdocs.org/jasc/2711): Aileron Tab Control System (415 reports)
- [JASC 2720](https://openairdocs.org/jasc/2720): Rudder Control System (3,130 reports)
- [JASC 2721](https://openairdocs.org/jasc/2721): Rudder Tab Control System (686 reports)
- [JASC 2722](https://openairdocs.org/jasc/2722): Rudder Actuator (284 reports)
- [JASC 2730](https://openairdocs.org/jasc/2730): Elevator Control System (2,647 reports)
- [JASC 2731](https://openairdocs.org/jasc/2731): Elevator Tab Control System (1,295 reports)
- [JASC 2740](https://openairdocs.org/jasc/2740): Stabilizer Control System (2,126 reports)
- [JASC 2741](https://openairdocs.org/jasc/2741): Stabilizer Position Indicating (889 reports)
- [JASC 2742](https://openairdocs.org/jasc/2742): Stabilizer Actuator (610 reports)
- [JASC 2750](https://openairdocs.org/jasc/2750): Trailing Edge Flap Control System (10,186 reports)
- [JASC 2751](https://openairdocs.org/jasc/2751): Trailing Flap Position Indicating System (3,078 reports)
- [JASC 2752](https://openairdocs.org/jasc/2752): Trailing Edge Flap Actuator (1,978 reports)
- [JASC 2760](https://openairdocs.org/jasc/2760): Drag Control System (3,502 reports)
- [JASC 2761](https://openairdocs.org/jasc/2761): Drag Control Actuator (1,070 reports)
- [JASC 2780](https://openairdocs.org/jasc/2780): Leading Edge Slat Control System (2,157 reports)
- [JASC 2781](https://openairdocs.org/jasc/2781): Leading Edge Slat Position Indicating System (1,398 reports)
- [JASC 2782](https://openairdocs.org/jasc/2782): Leading Edge Slat Actuator (1,225 reports)
- [JASC 2797](https://openairdocs.org/jasc/2797): Flight Control System Wiring (919 reports)

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